Only Glad bags have the double-lock green seal. So Many Uses - Food on the Go: Work, school lunches, picnics. Organize Household Items: Bathroom, bedroom, office, garage. Protect Important Items: Recipes, souvenirs, negatives, stamps. Travel: Jewelry, medications, toiletries, documents, money. Glad Sandwich Bags seal tight to help keep food fresh! Yellow and Blue Makes Green Seal: So you know when the bag is closed. Double-Lock Seal: Double security to protect your sandwich. Easy to Close: Wide seal is easy to open and close.